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26 Cards in this Set
- Front
- Back
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What is electric charge? |
A property that causes sub atomic particles such as protons and electrons to attract or repel each other |
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Protons are ... and Electrons are... |
Protons are positive and Electrons are negative |
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What creates a net of electric charge (electric field) |
An excess or shortage of electrons |
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If an atom gains 1+ electrons it becomes...charged If an atom loses 1+ electrons it becomes...charged |
If an atom gains 1+ electron it becomes negatively charged If an atom loses 1+ electron it becomes positively charged |
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What is the SI unit for electrical charge? |
Columb (C) |
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... attract ... repel |
Opposites attract Likes repel |
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Inside an atom the electrical forces are less than gravitational forces. (True or False) |
False, because in an atom the gravitational force is GREATER than electrical forces |
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Force and charge are ... proportional |
Force and charge are directly proportional |
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The strength of an electric field depends on what? |
1. The amount of the charge 2. The distance |
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What is static electricity? |
The study of the behavior of electrical charges including how it is transferred between objects |
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The three types of static electric are... |
Contact, Friction, and Induction |
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What occurs in a pathway, through which charges suddenly disappear? |
Static discharge |
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Electric current is... |
Electric current is the continuous flow of electric charge |
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What does AC and DC stand for? |
AC stands for alternating current DC stands for direct current |
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What is the SI unit for current? |
Amps (A) |
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What is resistance? |
The opposite of flow of charges in a material |
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What does resistance depend on? |
1. Temperature 2. Thickness 3. Length |
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What is the SI unit for resistance? |
OHM |
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What is the formula for resistance? |
V=I*R |
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What is an electric Circuit? |
A complete path through which charge can flow |
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What are the two types of an electric circuits? |
1. Series Circuit:one path 2. Paraelle Circuit: two+ paths |
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What is the electric power formula? |
P=I*V |
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What is the electrical energy formula? |
E=P*T |
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... prevents current overload in a circuit and can have the wire melting in the center of it if too much current passes through. |
Fuse prevents current overload in a circuit and can have the wire melting in the center of it if too much current passes through. |
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Electric signals are what? |
Information sent as a pattern in a controlled flow of energy through a circuit. |
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What are the two types of electrical signals? Describe them and give an example. |
1. Analog: Continuously changing voltage or current. They are smooth waves. An example is radio waves. 2. Digital: encodes information as a string of 1's and 0's. They are rougher waves. An example is computers. |
